The DuraFon PRO Handset functions as a cordless phone and a two-way radio. It is durable, ruggedized and features long hours of talk time or 50 hours of stand-by time before recharging. It offers extreme long-range capabilities and is hearing-aid compatible. EnGenius DURAFON PRO Cordless Phone Handset is one of many Expansion Handsets available through Office Depot. Made by EnGenius.